论文标题
混合价绝缘体中的主要
Majoranas in mixed-valence insulators
论文作者
论文摘要
金属中混合价杂质的物理模型必须满足两种偶像的弗里德尔筛选定理。在较早的工作中显示了这种模型，显示出低能量奇异性，是超对称性的，导致了自由的Majorana和相移的Majorana激发。该理论在适当的填充时大约扩展到混合价离子的晶格，而没有微调参数，除了混合价值颗粒和被间隙分离的混合价颗粒和孔带外，受保护的无间隙majorana fermana fermion fermion fermion fermion带。在这种情况下，该系统在线性响应中是电中性的，但具有de haas-van alphen振荡。这用于解释最近观察到的混合价绝缘体中的磁振荡及其伴随的低能量热力学和松弛率异常。提供了一些测试理论结果有效性的预测，其中最引人注目的是在这种化合物中应具有广泛的基态熵。
A physical model for a mixed-valence impurity in a metal must satisfy the Friedel screening theorem for both valences. Such a model is shown, following earlier work which showed low energy singularities in it, to be supersymmetric, leading to a free Majorana and a phase-shifted Majorana excitation. The theory extended approximately to a lattice of mixed-valence ions at appropriate filling gives, without fine-tuning the parameters, a protected gapless Majorana fermion band across the chemical potential, besides the mixed-valence particle and hole bands separated by gaps. In this situation the system is electrically neutral in linear response but has de Haas-van Alphen oscillations. This is used to explain the recently observed magneto-oscillations in mixed-valence insulators as well as their accompanying low energy thermodynamic and relaxation rate anomalies. Some predictions to test the validity of the theoretical results are provided, the most striking of which is that there should be extensive ground state entropy in such compounds.
